The most common causes of leg cramps in women are over-exercise, lack of calcium, muscle spasm, and lumbar disc herniation. 1. Excessive exercise: If a female patient performs strenuous exercise, it may cause the accumulation of lactic acid in the leg muscles, and lactic acid metabolism causes leg cramps, which can usually be relieved after sufficient rest. 2. Lack of calcium: the concentration of calcium ions can regulate the excitability of the muscles, due to a variety of reasons caused by the low concentration of calcium ions in the body of female patients, it is easy to cause leg cramps. 3. Muscle spasm: if the legs of female patients are stimulated by cold, it is easy to cause muscle and blood vessel spasm, which can easily cause leg cramps, and the patients need to do a good job of keeping their legs warm. 4. Lumbar disc herniation: the herniated lumbar disc compresses the nerve root, which may also cause numbness in the lower limbs, and then leg cramps. Causes of leg cramps in women are more reasons, if the symptoms continue without relief, it is recommended to go to the hospital in time to identify the cause of the disease, the doctor targeted treatment.